Antialiasing options are not effective on web build

[Calinou]

• Related to Anisotropic filtering isn't enabled on the web build #367.

On https://play.neverball.org as of July 2024, the antialiasing options can't be selected. Nothing happens if you try to select them (the Disabled option remains effective).

neverball_msaa_web.mp4

MSAA support is available in WebGL 1.0, so there's likely some way to enable it (or perhaps force it to 4× somehow, I doubt today's hardware has trouble with that). Like in #367, the main difficulty is finding a way to do this while using gl4es.